Channeling and grooving knife.



B. P. MAYO. GHANNELING AND GROOVIN G KNIFE. APPLICATION EILED APR. 4, 190a. RENEWED JUNE 20, 1908.

Patented Feb. 2, 1909.

. To all whom it may concern:

UNITED STATES PATENT OFFICE.

' BENEAMIN F. MAYO, OF SALEM, MASSACHUSETTS, ASSIGNOR TO UNI-TEE SHOE,M'ACHINERY COMPANY, OF PATTERSON, NEW JERSEY, A' CURPQRA'ITON OF NEW JERSEY.

Specification of Letters I a'tent.

Patented Feb. 2, 1909.

Application flied. April 4, 1905, Serial Nb. 253,782. Renewed June 20, 1908. Serial No. 439,596. r

Be it known that I, BENJAMIN F. MAYO, a citizen of the United States, residing at Sa-. lem, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Channeling and Grooving Knives; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an improved channeling and grooving knife and has for its object to provide a knife by whicha channel can be readily cut in a shoe sole and simultaneously a strip of material removed. from the. sole to form a fastening receiving groove in the channel extending the. length-of the channel at a uniform dispanes. from. the; base. of the channel flap. or

Heretofore when the operations of cutting a channel and removing a strip of material to form a groov in the channel have been performed knives have usually been employed. The use of separate knives, however, necessitates placing the grooving knifeback of the channelin'g knife and as a consequence the cutting edge of the grooving knife is displaced whenever the sole or the. knife holder is turned in cutting around a curve. or angle of the sole. This displacement of the cut.- ting edge of the grooving knife increases with the sharpness of the curve or angle and prohibits the simultaneous use of the knives on certain styles of soles as, for instance, soles with narrow or pointed toes or soles which present sharp curves or angles at the junction of the shank and forepart.

In accordance with the present invention the cutting edges which cut the channel and remove a strip of material to form a groove in the channel are formed on the same knifeand are arranged in a planesubstantially perpendicular to the direction in which the knife cuts. This arrangement of the cuttin edges allows the sole or the knife holder to e turned through any desired angle without displacing the groove cutting edge and. consequently the knife can be used to channel and groove all styles of soles.

Preferably the channeicutting or lip formsimultaneously two separate I inner end of the knife. blade can be=made thin to allow the knife tocut through the stock without being cramped. The portion of the knife which terminates in the groove cutting edge and which acts as a groove cutting blade preferably projects obliquely from the: surface of that portion of the knife which actsas a channel cutting or lip i forming bladein order to prevent any binds ing or cramping action of thegro'ove cutting blade in thegroove during the turning movements of the sole or of the knife holder. I v

The featuresv of the present invention will. be clearly understood from an inspection of the drawing accompanying this application,

in which-.s

Figure 1 is a. perspeetive; view on an en larged scale 'of. the: improved channeling and grooving knife and also showing a portion. of a shoe: sole which has; been acted. upon by the knife, Fig. 2 is a plan view of v illustrating theactionu on. a shoe sole of epara e c nne g g i g kn shen used a so eund ngand han el a ine compri ng a relati y o le- P tte n and k fe car e a is a view illustrating the action upon. a shoele of y' mpro-v d h n ing. n m ng kni hen se in he me ki f a machine.

- The. knife illustrated in thedrawing as embodying the present invention comprises a shank portion 1 adapted to be clamped in a suitable holder and: a blade portion 2 oil'- set with relation to the shank and connected thereto by acurved portion 3. Upon the blade portion 2 are formed two cutting edges 4 and 5, the edge 4 being adapted to cut a channel in the sole and form. a channel flap or lip and the edge 5 bein adapted to remove a strip of material romthe sole to form a fastening receiving groove in the channel; The edge 4-is' continuous from its: outer end 6.- to its? inner end 7 and. curvessharply at the point 8 in order to 'form a .4. perpendicular to the direction in which the knife cuts. At its inner end the edge 4 extends beyond the groove cutting edge 5 and the inner end of the knife blade back of the cutting edge 4 is reduced in thickness, so

that a comparatively thin edge is formed at the inner end of the blade. The blade portion of the knife is provided with a passage way for the strip of material removed by the cutting edge 5, which extends from the cutting. edges at the mouth of the way obliquely with relation to the d rection in which the knife cuts and with relation to the cutting edge 4 ,in order that the strip of material may be properly directed away from the work. The portion of the knife upon which the cutting edge 5 is formed and which acts as a groove cutting blade projects in the sole.

The manner in which the channeling and grooving knife above described acts upon a shoe sole is clearly illustrated in Figs. 1 and 7. As the knife passes through the material of the sole the cutting edge 4 forms a lip 9 and the cutting edge 5 removes a strip of material from the sole to form the fastening receiving groove 10. Since the cutting edge 4 at its inner end extends beyond the cutting edge 5 the groove 10 is formed at a distance from the base of the 1i 9 sufficient to allow the lip to be displace by the knife blade without exerting an objectionable cramping pressure thereon. At its base the lip cannot be displaced readily to any appreciable extent and'for this reason the inner end of cutting the knife is reduced to a thinedge. As the sole or knife is swung in cutting around sharp curves or an les of the sole the cutting edge 5 remains at t e same distance frbm the base of the channel flap orlip formed by the edge 4 and consequently the groove forme in the channel extends the length of the channel at a uniform distance from the base of the lip, this result beifig due to the fact that thecutting edge 5 is in substantially the'sanie plane with the cutting edge 4 perpendicular to the direction in which the knife cuts. This result cannot be secured by the use of separate channeling and grooving knives as in such case the grooving knife is necessarily placed at the rear of the channeling knife and is moved outwardly away from assage 1 the base of the channel flap when the sole or the holder in which the knives are secured is swung in cutting around sharp curves or angles of the pattern. In Fig. 6 the effect of this displacement of the grooving knife is indicated. at 11, the groove 10 bending abruptly outward as it passes around the toe portion of the sole. By the use of a channeling and grooving knife constructed in accordance with the present invention a sole of the shape illustrated in Fig. 6 can be simultaneously channeled and grooved and the groove maintained at a uniform distance from the base of the channel flap, as indicated in Fig. 7.

The nature and scope of the present invention having been indicated and a knife embodying the same havin been specifically described, what is claime is 1. A channeling and grooving knife having a continuous lip forming cuttin edge, and a groove forming cutting edge ocated in substantially the same plane with the lip forming cutting edge perpendicular to the direction in which the knife cuts, substantially as described.

2. A channeling and grooving knife having a continuous lip forming cuttin edge, and a groove forming cutting edge ocated "in substantially the same plane with the lip forming cutting edge perpendicular to the direction in which the knife cuts, said lip forming cutting edge at its inner end extending beyond the groove forming cutting edge, substantially as described.

3. A channelin and groovin knife having a lip formingTJlade provided with a continuous cutting edge, and a groove forming blade extendin obliquely from the surface of the lip forming blade and provided with a cutting edge in substantially the same plane with the cuttin edge of the lip forming blade perpendicu ar to the direction in which the knife cuts, substantially as described.

4. A channeling and ooving knife having a lip forming bla e provided with a continuous cutting edge, and a groove forming blade integral with and extending from the lip forming blade, the cutting edge of the lip forming blade at its inner end extending beyond" the cutting edge of the groove forming blade, substantially as described.

In testimony whereof I affix my signature, in presence of two witnesses.

I BENJAMIN F. MAYO.

Witnesses:

FRED O. FISH, ALFRED H. HILDRETH. 

